Manipal MET2012PhysicsElectromagnetic Induction
The current in a coil changes from 0 to 2 A in 0.05 s . If the induced emf is 80 V , the self-inductance of the coil is,
Options
- A1 H
- B0.5 H
- C1.5 H
- D2 H
Correct answer
D. 2 H
Step-by-step solution
From the formula, =-L d I d t Take magnitude on both sides. array ll & | |= |-L d I d t | or =L d I d t & 80=L ( 2 0.05 ) 80=L 40 & L= 80 40 L=2 H array